CN110285005A - A kind of turbine draft tube with round and oval grid - Google Patents
A kind of turbine draft tube with round and oval grid Download PDFInfo
- Publication number
- CN110285005A CN110285005A CN201910402573.XA CN201910402573A CN110285005A CN 110285005 A CN110285005 A CN 110285005A CN 201910402573 A CN201910402573 A CN 201910402573A CN 110285005 A CN110285005 A CN 110285005A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- splitter
- right cone
- draft tube
- round
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/04—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for diminishing cavitation or vibration, e.g. balancing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The present invention discloses the turbine draft tube that one of blade fluid machinery technical field has round and oval grid, most external is the right cone cylinder that axial cross section is taper, shunt cylinder is equipped with inside right cone cylinder, support frame is fixedly connected between the lateral wall of shunt cylinder and the inner sidewall of right cone cylinder, discoidal splitter is equipped with inside shunt cylinder, it seals and is fixedly connected between the outer wall of splitter and the inner wall of shunt cylinder, the middle of splitter is provided with the round hole of perforation, on the splitter on the outside of round hole, along the circumferential direction it is uniformly arranged several identical elliptical apertures, the long axis direction of each elliptical aperture is the diametrical direction along splitter；Splitter is used to be crushed vortex rope, reduce the pressure fluctuation of vortex rope bring, since the grid on splitter is oval and round, fluid is separated and is fallen off small, reduce the pressure difference of draft tube inner periphery and center, weaken vortex rope radial pulsation, reduces cavitation caused by vortex rope inside draft tube, extend the service life of draft tube.
Description
Technical field
The invention belongs to blade fluid machinery technical fields, are related to a kind of draft tube structure of Francis turbine.
Background technique
The hydraulic turbine belongs to one kind of turbomachinery, as the fluid machinery of vane type, is mounted on water power as shown in Figure 1
In standing, the potential energy of water is changed into kinetic energy by water level potential difference by the hydraulic turbine, to drive power generation.As shown in Figure 1, the hydraulic turbine 2 is pacified
In the upstream water level 3 of dam body 4, the live spindle 8 of the hydraulic turbine 2 connects with the main shaft of generator 1, at the same with the hydraulic turbine 2
Runner connects.Draft tube 5 is placed in the underface of the outlet of rotary wheel of the hydraulic turbine 2, and draft tube 5 is in dam body 4, under draft tube 5
Side is the level of tail water 7.The effect of draft tube 5 is guided the water of the runner left in the hydraulic turbine 2 to the downstream row mouth of a river 6, and benefit
With the portion of energy of outlet of rotary wheel water flow.
During water flow leaves the runner of the hydraulic turbine 2, since water velocity reduces, pressure increases, when water flow enters
When draft tube 5,5 inner periphery pressure of draft tube is big and center pressure is small, and surrounding and center pressure difference is caused to become larger, it may occur that because
Flow rate of water flow reduces, pressure improves the broken and eccentric phenomenon for causing vortex rope, causes serious radial pressure pulsation existing with this
As, while the phenomenon that be also easy to happen secondary back, to influence the stationary performance of the overall operation of the hydraulic turbine 2.Therefore, tail water
Hydraulic stability in pipe 5 is the major criterion for evaluating water turbine units performance and energy indexes.
Currently, usual way is to reduce draft tube vortex rope pressure fluctuation: one, it is installed in the outlet of rotary wheel of the hydraulic turbine 2
Sufficiently long cylindrical body is provided with enough concora crush holes on cylinder surface to cut down vortex rope panting action；Its there are the problem of
Be: since the runner of the hydraulic turbine itself is connect with live spindle, vibration caused by water flow can be directly delivered in live spindle, be made
Vibration and noise occurs at unit.Two, water conservancy diversion latticed wing is installed in draft tube, cuts down the vortex rope bias band generated in draft tube
The pressure fluctuation come；Itself the problem is that: the space structure of water conservancy diversion latticed wing is complicated, and cavitation can be generated inside draft tube, is made
At serious cavitation corrosion, latticed wing is caused easily to be destroyed, service life is short, and when the specific speed of the hydraulic turbine is larger, effectiveness in vibration suppression is not
Obviously.Three, the flow regulating barrels of regular hexagon are installed in draft tube pipe, reduce the vortex rope inside corresponding draft tube pipe causes pressure
Pulsation；Itself the problem is that: the shape of regular hexagon flow regulating barrels destroys draft tube interior flow field serious, can generate in inside
Fluid is separated and is fallen off, and causes draft tube low to fluid energy recovery efficiency, and regular hexagon flow regulating barrels can carry out vortex rope
Secondary destruction will cause flow regulating barrels itself discontinuity, be easy to produce deformation, furthermore, in the inside of regular hexagon flow regulating barrels
There is also partial pressure panting action, cause to consume, internal pressure reduces excessively, and cavitation is serious, leads to entire draft tube cavitation corrosion.
Summary of the invention
The separation of flow generated when water flow flows through draft tube in operation the purpose of the present invention is to solve the existing hydraulic turbine with
And the secondary back problem caused, propose it is a kind of can reduce radial pressure pulsation, improve the performance that runs smoothly have it is round and
The turbine draft tube of oval grid.
A kind of turbine draft tube with round and oval grid of the present invention the technical solution adopted is that: most external is
Axial cross section is the right cone cylinder of taper, and right cone cylinder upper end is that taper small end, lower end are taper big ends, is equipped with and shunts inside right cone cylinder
Cylinder, the central axis of shunt cylinder is conllinear with the central axis of right cone cylinder, and shunt cylinder axial cross section is taper, and the upper end of shunt cylinder is taper
Small end, lower end are taper big ends, are fixedly connected with support frame between the lateral wall and the inner sidewall of right cone cylinder of shunt cylinder, in shunt cylinder
Portion is equipped with discoidal splitter, and splitter is horizontally disposed, seals between the outer wall of splitter and the inner wall of shunt cylinder and fixed
Connection, the middle of splitter is provided with the round hole of perforation, on the splitter on the outside of round hole, is along the circumferential direction uniformly arranged
Several identical elliptical apertures, the long axis direction of each elliptical aperture be the diametrical direction along splitter.
Further, the outside diameter d of shunt cylinder upper surface1=0.17L1, the outside diameter d of shunt cylinder lower end surface2=0.25L1, L1It is
The axial height of right cone cylinder；The radius r=0.33d of round hole1, the axial length of the semi-major axis of each elliptical aperture is a, the axis of semi-minor axis
A length of b, 0.3d2< a < 0.5d2, 0.2d2< b < 0.3d2, between the elliptical center of each elliptical aperture and the center of round hole
Horizontal distance L7=0.6r.
The present invention by adopting the above technical scheme after advantage be:
1, the present invention installs shunt cylinder inside draft tube, will not be by the load transmission of receiving to live spindle, will not
The vibration for causing water turbine set main shaft ensure that water turbine units stable operation when deviateing design conditions, deviate design conditions
Vibration noise is small when work, the hydraulic turbine for being 80~100 suitable for specific speed, because applicable working condition range is big, and pressure of the present invention
Power ripple frequency can reduce to 1/8~1/6, and amplitude is reduced to 100kPa, obvious to ripple frequency reduction effect, amplitude abatement
Effect is obvious.
2, the present invention is mounted with that the splitter with grid reduces vortex rope band for being crushed vortex rope inside shunt cylinder
Come pressure fluctuation, since the grid on splitter is oval and round, fluid separate and fall off it is small, reduce draft tube inside
The pressure difference of surrounding and center weakens vortex rope radial pulsation, reduces vortex rope energy, reduces sky caused by vortex rope inside draft tube
Change, extends the service life of draft tube.
3, the present invention does not influence the efficiency of hydraulic turbine normal work, inhibits backflow phenomenon well, avoids in water wheels yet
It is excavated on a large scale below machine, solves the problems, such as the forced oscillation that vortex rope generates under sub-load, efficiently solve unit
Resonance problem.
Detailed description of the invention
Fig. 1 is the assembling schematic diagram of the hydraulic turbine and its associated member in power station；
Fig. 2 is a kind of three-dimensional structure section view of turbine draft tube with round and oval grid of the present invention
Figure；
Fig. 3 is that Fig. 2 looks up axonometric drawing；
Fig. 4 is the main view of Fig. 2；
Fig. 5 is the top perspective view removed after flange and support frame on the basis of Fig. 4；
Fig. 6 is that shunt cylinder in Fig. 4 and splitter look up enlarged drawing；
In figure: 1- generator；The 2- hydraulic turbine；3- upstream water level；4- dam body；5- draft tube；6- discharge outlet；7- downstream water
Position；8- live spindle；9- right cone cylinder；10- shunt cylinder；11- support frame；12- splitter；The round hole of 13- splitter；14- points
The elliptical aperture of flow；15- flange.
Specific embodiment
Referring to figs. 2 and 3, draft tube 5 of the present invention is by right cone cylinder 9, shunt cylinder 10, splitter 12 and support frame 11
Composition.Most external is right cone cylinder 9, and it is that taper is small that the axial cross section of right cone cylinder 9, which is taper, and the upper end of right cone cylinder 9 is water inlet
End, lower end is water outlet, is taper big end, penetrates through inside right cone cylinder 9 from water inlet to water outlet.At the upper end of right cone cylinder 9
Mounting flange 15, right cone cylinder 9 are fixed by flange 15.
Shunt cylinder 10 is set inside right cone cylinder 9, and the axial cross section of shunt cylinder 10 is also taper, the central axis of shunt cylinder 10
It is conllinear with the central axis of right cone cylinder 9.The upper end of shunt cylinder 10 is taper small end, and lower end is taper big end.10 empty set of shunt cylinder exists
The inside of right cone cylinder 9 is not contacted with right cone cylinder 9, and the cone angle phase of shunt cylinder 10 and the taper of the axial cross section of right cone cylinder 9
Deng in this way, the barrel of right cone cylinder 9 is parallel with the barrel of shunt cylinder 10.The axial height of shunt cylinder 10 is less than the axis of right cone cylinder 9
To height, there is a distance in upper end of the upper end of shunt cylinder 10 apart from right cone cylinder 9, and the lower end of shunt cylinder 10 is apart from right cone cylinder 9
There is a distance in lower end, and entire shunt cylinder 10 is made to be contained in the inside of right cone cylinder 9.
Fixed inside shunt cylinder 10 to be embedded with discoidal splitter 12, splitter 12 is horizontally disposed, the circle of splitter 12
It seals and is fixedly connected between shape outer wall and the inner wall of shunt cylinder 10.The middle of splitter 12 is provided with the round hole 13 of perforation,
The diameter of round hole 13 is less than the outer diameter of splitter 12.On the splitter 12 in 13 outside of round hole, along the circumferential direction uniformly set
Several identical elliptical apertures 14 are set, the present invention is provided with 8 elliptical apertures 14.The long axis direction of each elliptical aperture 14 is edge point
The diametrical direction of flow 12.The outer wall of elliptical aperture 14 and splitter 12, round hole 13 hole wall between there are distances.In this way,
It is provided with the round and latticed hole of ellipse on splitter 12, allows the water to flow through the round and latticed hole of ellipse.
Be fixedly connected with support frame 11 between the lateral wall of shunt cylinder 10 and the inner sidewall of right cone cylinder 9, support frame 11 have it is multiple,
It is evenly arranged between shunt cylinder 10 and right cone cylinder 9, shunt cylinder 10 is fixed together by support frame 11 with right cone cylinder 9.This hair
Support frame 11 in bright is equipped with 6, and the section of support frame 11 is square, is connected on the axial height direction of shunt cylinder 10
Middle.
Referring to fig. 4, the axial height of right cone cylinder 9 is L1, L1=1196~1716mm.The axial height of flange 15 is L2,
0.05L1≤L2≤0.06L1.The axial height of shunt cylinder 10 is L3, 0.2L1≤L3≤0.3L1.The axial height of splitter 12 is
L4, L4=0.095L3.The axial height of support frame 11 is L5, L5=0.125L3.Under the lower end surface of shunt cylinder 10 to right cone cylinder 9
The axial distance of end face is L6, L6=1.2L3.The wall thickness t of right cone cylinder 91=0.25L2, the wall thickness t of shunt cylinder 102=
0.15L2.The outer diameter of 10 upper surface of shunt cylinder is d1,d1=0.17L1, the outer diameter of 10 upper surface of shunt cylinder is d2,d2=0.25L1。
Referring to Fig. 5, the outer diameter of 9 lower end surface of right cone cylinder is D2,D2=0.88L1, the outer diameter of 9 upper surface of right cone cylinder is D1,D1=
0.32L1。
Referring to Fig. 6, the radius of round hole 13 is r, and r=0.33d1.Elliptical aperture 14 has 8, two neighboring elliptical aperture 14
Long axis between angle be β, β=45 °.The axial length of the semi-major axis of each elliptical aperture 14 is a, and the axial length of semi-minor axis is b,
0.3d2< a < 0.5d2, 0.2d2< b < 0.3d2.Water between the elliptical center of each elliptical aperture 14 and the center of round hole 13
Flat distance is at a distance of L7, L7=0.6r.
Referring to Fig. 1-6, the hydraulic turbine 2 is under certain operating condition, pressure fluctuation power F, pressure caused by eccentric vortex band in right cone cylinder 9
Pulsating force F is vortex rope eccentric distance e and the circumference tangential component C of the horizontal section flow velocityu2Function, i.e. F=f (efCu2).According to
Vortex rope pressure P calculation formula:P is the vortex rope pressure being subject to, and R is the radius of the hydraulic turbine 2, and ρ is
Fluid density, CeIt is the circumferential components at radius R, efIt is the vortex rope eccentricity at radius R.Shunt cylinder 10 in the present invention
Effect be that the water flow velocity in right cone cylinder 9 is made to be distributed as symmetrically, reducing vortex rope eccentric distance efValue, that is, reduce vortex rope revolution
Radius reduces energy pressure fluctuation to reduce the value of vortex rope pressure P in this way, vibrates and asks caused by reducing due to vortex rope offset
Topic.When water flow enters right cone cylinder 9 there are circular rector, vortex rope offset is existed simultaneously, the phenomenon that vortex rope falls off, by shunt cylinder 10,
The flowing being classified as between 10 internal flow of shunt cylinder and shunt cylinder 10 and 9 inner wall of right cone cylinder, it is inclined to reduce vortex rope in this way
Move, at the same when fluid by the elliptical aperture 14 inside shunt cylinder 10 grid and round hole 13 grid when, the net of round hole 13
The grid of lattice and elliptical aperture 14 destroys the eccentric vortex band of 10 internal flow of shunt cylinder, reduces vortex rope eccentricity, and then subtract
Pressure fluctuation caused by few vortex rope is eccentric, the grid of round hole 13 and the grid of elliptical aperture 14 inhibit eccentric vortex band dose-effect fruit bright
It is aobvious, and in the grid of the grid and elliptical aperture 14 that flow through round hole 13, local resistance loss is small, and fluid boundary layer separation is small,
Reach pressure fluctuation caused by reducing vortex rope bias, cuts down the pressure fluctuation inside right cone cylinder 9, simultaneously because the work of grid
With the Reynolds number at vortex rope center reduces, and such 9 interior cavitation of right cone cylinder can also reduce, and reduces fluid to the sky of right cone cylinder 9
Erosion, prolongs its service life.
Claims (6)
1. a kind of turbine draft tube with round and oval grid, most external are the right cone cylinders that axial cross section is taper
(9), it is taper big end that right cone cylinder (9) upper end, which is taper small end, lower end, it is characterized in that: being equipped with shunt cylinder inside right cone cylinder (9)
(10), the central axis of shunt cylinder (10) is conllinear with the central axis of right cone cylinder (9), and shunt cylinder (10) axial cross section is taper, shunts
It is taper big end that the upper end of cylinder (10), which is taper small end, lower end, the inner sidewalls of the lateral wall of shunt cylinder (10) and right cone cylinder (9) it
Between be fixedly connected support frame (11), be equipped with discoidal splitter (12) inside shunt cylinder (10), splitter (12) is horizontally disposed,
It seals and is fixedly connected between the outer wall of splitter (12) and the inner wall of shunt cylinder (10), the middle of splitter (12), which is provided with, to be passed through
Logical round hole (13), the splitter on the outside of round hole (13) (on 120, it is identical to be along the circumferential direction uniformly arranged several
Elliptical aperture (14), the long axis direction of each elliptical aperture (14) is the diametrical direction along splitter (12).
2. a kind of turbine draft tube with round and oval grid according to claim 1, it is characterized in that: shunting
The outside diameter d of cylinder (10) upper surface1=0.17L1, the outside diameter d of shunt cylinder (10) lower end surface2=0.25L1, L1It is the axis of right cone cylinder (9)
To height；Round hole (130 radius r=0.33d1, the axial length of the semi-major axis of each elliptical aperture (14) is a, the axial length of semi-minor axis
For b, 0.3d2< a < 0.5d2, 0.2d2< b < 0.3d2, the center of the elliptical center of each elliptical aperture (14) and round hole (13)
Between horizontal distance L7=0.6r.
3. a kind of turbine draft tube with round and oval grid according to claim 1, it is characterized in that: shunting
The axial height of cylinder (10) is L3, 0.2L1≤L3≤0.3L1, L1It is the axial height of right cone cylinder (9)；The axial direction of splitter (12)
Height L4=0.095L3, the axial distance L of the lower end surface of shunt cylinder (10) to the lower end surface of right cone cylinder (9)6=1.2L3, support
The axial height L of frame (11)5=0.125L3。
4. a kind of turbine draft tube with round and oval grid according to claim 1, it is characterized in that: flange
(15) axial height is L2, 0.05L1≤L2≤0.06L1, L1It is the axial height of right cone cylinder (9), the barrel of right cone cylinder (9) is thick
Spend t1=0.25L2, the wall thickness t of shunt cylinder (10)2=0.15L2。
5. a kind of turbine draft tube with round and oval grid according to claim 1, it is characterized in that: right cone
The outer diameter D of cylinder (9) lower end surface2=0.88L1, the outer diameter D of right cone cylinder (9) upper surface1=0.32L1。
6. a kind of turbine draft tube with round and oval grid according to claim 1, it is characterized in that: oval
Hole (14) has 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910402573.XA CN110285005B (en) | 2019-05-15 | 2019-05-15 | Water turbine draft tube with circular and elliptical grids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910402573.XA CN110285005B (en) | 2019-05-15 | 2019-05-15 | Water turbine draft tube with circular and elliptical grids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110285005A true CN110285005A (en) | 2019-09-27 |
| CN110285005B CN110285005B (en) | 2020-11-03 |
Family
ID=68001796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910402573.XA Active CN110285005B (en) | 2019-05-15 | 2019-05-15 | Water turbine draft tube with circular and elliptical grids |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110285005B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927675A (en) * | 2020-07-10 | 2020-11-13 | 江苏大学 | Utilize regular hexagon water conservancy diversion bars to do draft tube of suppressing whirlpool device |
| CN111927676A (en) * | 2020-07-10 | 2020-11-13 | 江苏大学 | Draft tube using guide grid composed of rectangular guide fins as vortex suppression device |
| CN111927673A (en) * | 2020-07-10 | 2020-11-13 | 江苏大学 | Take central tube of grid net to do draft tube of suppressing whirlpool device |
| CN111927672A (en) * | 2020-07-10 | 2020-11-13 | 江苏大学 | Draft tube using guide grid composed of cylinders as vortex suppression device |
| CN111927674A (en) * | 2020-07-10 | 2020-11-13 | 江苏大学 | Draft tube using flow guiding grid composed of three regular hexagonal through grooves as vortex suppression device |
| CN112360660A (en) * | 2020-11-06 | 2021-02-12 | 陕西省引汉济渭工程建设有限公司 | Long and short blade type reversible pump turbine |
| CN113958439A (en) * | 2021-11-25 | 2022-01-21 | 国网新源控股有限公司 | Method and device for weakening turbine tail water vortex band |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3292901A (en) * | 1965-03-04 | 1966-12-20 | Newport News S & D Co | Turbine apparatus |
| JP4825376B2 (en) * | 2001-09-05 | 2011-11-30 | 古河機械金属株式会社 | Sludge digester agitator |
| CN103982361A (en) * | 2014-06-03 | 2014-08-13 | 中山市创想模型设计有限公司 | Draft tube for water turbine |
| CN204532665U (en) * | 2015-03-20 | 2015-08-05 | 广东梅雁吉祥水电股份有限公司 | The combined type draft tube structure of water turbine |
| CN105240186A (en) * | 2015-10-16 | 2016-01-13 | 江苏大学 | Hydraulic design method for tail water pipe of small hydraulic turbine device |
| CN108050004A (en) * | 2017-12-21 | 2018-05-18 | 天津市凯达重型水电设备制造有限公司 | Constant pressure type power station tail pipe |
| CN108119289A (en) * | 2017-11-29 | 2018-06-05 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of draft tube convenient for assembly and connection |
| CN207526626U (en) * | 2017-11-29 | 2018-06-22 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of flow regulating barrels have the draft tube that can be adjusted axially |
-
2019
- 2019-05-15 CN CN201910402573.XA patent/CN110285005B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3292901A (en) * | 1965-03-04 | 1966-12-20 | Newport News S & D Co | Turbine apparatus |
| JP4825376B2 (en) * | 2001-09-05 | 2011-11-30 | 古河機械金属株式会社 | Sludge digester agitator |
| CN103982361A (en) * | 2014-06-03 | 2014-08-13 | 中山市创想模型设计有限公司 | Draft tube for water turbine |
| CN204532665U (en) * | 2015-03-20 | 2015-08-05 | 广东梅雁吉祥水电股份有限公司 | The combined type draft tube structure of water turbine |
| CN105240186A (en) * | 2015-10-16 | 2016-01-13 | 江苏大学 | Hydraulic design method for tail water pipe of small hydraulic turbine device |
| CN108119289A (en) * | 2017-11-29 | 2018-06-05 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of draft tube convenient for assembly and connection |
| CN207526626U (en) * | 2017-11-29 | 2018-06-22 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of flow regulating barrels have the draft tube that can be adjusted axially |
| CN108050004A (en) * | 2017-12-21 | 2018-05-18 | 天津市凯达重型水电设备制造有限公司 | Constant pressure type power station tail pipe |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927675A (en) * | 2020-07-10 | 2020-11-13 | 江苏大学 | Utilize regular hexagon water conservancy diversion bars to do draft tube of suppressing whirlpool device |
| CN111927676A (en) * | 2020-07-10 | 2020-11-13 | 江苏大学 | Draft tube using guide grid composed of rectangular guide fins as vortex suppression device |
| CN111927673A (en) * | 2020-07-10 | 2020-11-13 | 江苏大学 | Take central tube of grid net to do draft tube of suppressing whirlpool device |
| CN111927672A (en) * | 2020-07-10 | 2020-11-13 | 江苏大学 | Draft tube using guide grid composed of cylinders as vortex suppression device |
| CN111927674A (en) * | 2020-07-10 | 2020-11-13 | 江苏大学 | Draft tube using flow guiding grid composed of three regular hexagonal through grooves as vortex suppression device |
| CN111927675B (en) * | 2020-07-10 | 2022-02-15 | 江苏大学 | Utilize regular hexagon water conservancy diversion bars to do draft tube of suppressing whirlpool device |
| CN111927676B (en) * | 2020-07-10 | 2022-02-15 | 江苏大学 | Draft tube using guide grid composed of rectangular guide fins as vortex suppression device |
| CN112360660A (en) * | 2020-11-06 | 2021-02-12 | 陕西省引汉济渭工程建设有限公司 | Long and short blade type reversible pump turbine |
| CN112360660B (en) * | 2020-11-06 | 2022-07-12 | 陕西省引汉济渭工程建设有限公司 | Long and short blade type reversible pump turbine |
| CN113958439A (en) * | 2021-11-25 | 2022-01-21 | 国网新源控股有限公司 | Method and device for weakening turbine tail water vortex band |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110285005B (en) | 2020-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110285005A (en) | A kind of turbine draft tube with round and oval grid | |
| EP2638944B1 (en) | An apparatus for the cleaning of crankcase gas | |
| BR112013025809B1 (en) | DEVICE FOR CLEANING A GAS | |
| CN110259622B (en) | Straight-cone-shaped draft tube with elliptical and regular hexagonal grids | |
| CN101865160B (en) | Partial emission pump with low specific speed | |
| JP5135033B2 (en) | Runner vane of axial hydraulic machine | |
| RU2687188C2 (en) | Francis turbine with short blades and short rim | |
| CN108691717B (en) | Mixed-flow water turbine with double rotating wheels | |
| CN206957856U (en) | A kind of runner system of parent population profile shaft flow water turbine | |
| CN100427753C (en) | Mixed flow type water turbin having H-type flow path rotary wheel | |
| CN112814820B (en) | Water turbine generator set | |
| CN202707620U (en) | Novel pump body with multiple division plates | |
| US20140154057A1 (en) | Francis turbine or a francis pump or a francis pump turbine | |
| CN111927672A (en) | Draft tube using guide grid composed of cylinders as vortex suppression device | |
| CN110296032B (en) | Bidirectional full-through-flow turbine | |
| CN111255624B (en) | Method for reducing damage of heavy-load drum-shaped vortex band of mixed-flow water turbine | |
| CN203655646U (en) | Vertical condensate pump provided with balance device | |
| CN111927673A (en) | Take central tube of grid net to do draft tube of suppressing whirlpool device | |
| CN112177831B (en) | Bidirectional through-flow turbine with runner chamber in sawtooth structure | |
| CN203146407U (en) | Rear vertical shaft tubular pump device with front guide vane | |
| CN105626581A (en) | Stress application centrifugal pump with pressurization hole | |
| CN104481776A (en) | Mixed-flow rotating wheel suitable for dry season operation and water turbine with same | |
| CN211081987U (en) | 2.5 MW-level organic working medium radial turbine impeller with low axial force | |
| CN215409370U (en) | Security blade halving structure of guide blade body odd number overflowing guide blade | |
| CN213598114U (en) | Hyperbolic type fluting wash-out awl |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |